CN108508578B

CN108508578B - Optical imaging lens

Info

Publication number: CN108508578B
Application number: CN201810294461.2A
Authority: CN
Inventors: 陈锋; 殷焱煊; 樊大正
Original assignee: Genius Electronic Optical Co Ltd
Current assignee: Genius Electronic Optical Co Ltd
Priority date: 2018-03-30
Filing date: 2018-03-30
Publication date: 2020-03-17
Anticipated expiration: 2038-03-30
Also published as: US20210191078A1; US11586010B2; US10921555B2; CN108508578A; CN111273425A; TW201839444A; TWI664464B; CN118330846A; US20190302410A1; CN111273425B

Abstract

The invention discloses an optical imaging lens which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis. The optical imaging lens only comprises the six lenses with the refractive indexes. The optical axis area of the image side surface of the second lens is a convex surface. The optical axis area of the object side surface of the third lens is a concave surface. The optical axis area of the object side surface of the fourth lens is a convex surface. The fifth lens element has a positive refractive index, and an optical axis region of an object-side surface of the fifth lens element is concave. The optical imaging lens conforms to: V3-V6 ≧ 20.000. V3 is the abbe number of the third lens. V6 is the abbe number of the sixth lens. The optical imaging lens can still keep good optical performance under the condition of shortening the length of a lens system.

Description

Optical imaging lens

Technical Field

The invention relates to the field of optical imaging, in particular to an optical imaging lens.

Background

The specifications of consumer electronic products are changing day by day, and the steps for pursuing light, thin, short and small products are not slowed down, so that the specifications of key components of electronic products such as optical imaging lenses and the like must be continuously improved to meet the requirements of consumers. The most important characteristics of an optical imaging lens include imaging quality and volume. In addition, it is increasingly important to increase the angle of the field of view and maintain a constant aperture size. In terms of imaging quality, as image sensing technology advances, consumer demands for imaging quality and the like are also increasing. Therefore, in the field of designing optical imaging lenses, in addition to the reduction in thickness of the lenses, it is necessary to achieve both the imaging quality and performance of the lenses.

However, the optical imaging lens design does not simply scale down a lens with good imaging quality to make an optical imaging lens with both imaging quality and miniaturization. The design process involves not only material characteristics, but also practical issues of manufacturing and assembly yield.

The technical difficulty of manufacturing a miniaturized lens is obviously higher than that of a traditional lens, so how to manufacture an optical imaging lens meeting the requirements of consumer electronic products and continuously improve the imaging quality of the optical imaging lens is eagerly pursued by the product, official and academic circles in the field for a long time.

Disclosure of Invention

The invention provides an optical imaging lens which can still keep good optical performance under the condition of shortening the length of a lens system.

An optical imaging lens assembly according to an embodiment of the present invention includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element to the sixth lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light. The optical imaging lens only comprises the six lenses with the refractive indexes. The optical axis area of the image side surface of the second lens is a convex surface. The optical axis area of the object side surface of the third lens is a concave surface. The optical axis area of the object side surface of the fourth lens is a convex surface. The fifth lens element has a positive refractive index, and an optical axis region of an object-side surface of the fifth lens element is concave. The optical imaging lens conforms to: V3-V6 ≧ 20.000. V3 is the abbe number of the third lens. V6 is the abbe number of the sixth lens.

An optical imaging lens assembly according to an embodiment of the present invention includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element to the sixth lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light. The optical imaging lens only comprises the six lenses with the refractive indexes. The optical axis area of the image side surface of the second lens is a convex surface. The optical axis area of the object side surface of the third lens is a concave surface. The fifth lens has a positive refractive index, and an optical axis region of an object side surface of the fifth lens is a concave surface. The optical imaging lens conforms to: V3-V6 ≧ 20.000 and AAG/T4 ≦ 5.000.

An optical imaging lens assembly according to an embodiment of the present invention includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element to the sixth lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light. The optical imaging lens only comprises the six lenses with the refractive indexes. The optical axis area of the image side surface of the second lens is a convex surface. The optical axis area of the object side surface of the third lens is a concave surface. The optical axis area of the object side surface of the fifth lens is a concave surface. The optical imaging lens conforms to: V3-V6 ≧ 20.000 and AAG/T5 ≦ 1.800.

The optical imaging lens can selectively meet any one of the following conditions:

(T1+G12)/(G23+G34+G56)≧3.600，

TTL/(T1+T5)≦4.800，

EFL/(T3+G56)≧4.600，

AAG/T2≦4.000，

TTL/T5≦7.800，

ALT/(T4+G56)≧3.700，

ALT/(G23+G34+G56)≧10.200，

TTL/(T5+T6)≦6.000，

TTL/(T4+G56)≧13.800，

AAG/G45≦6.000，

EFL/T5≦4.200，

BFL/T3≧3.100，

(G12+T5)/(G23+G34+G56)≧4.500，

TL/(T1+T5)≦4.100，

ALT/(T3+G56)≧6.200，

TTL/(T2+T6)≦5.100，

TL/(T3+T5)≦4.000，

wherein ALT is the total thickness of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element on the optical axis, TTL is the distance between the object side surface of the first lens element and the imaging surface on the optical axis, AAG is the total five air gaps between the first lens element and the sixth lens element on the optical axis, EFL is the system focal length of the optical imaging lens, BFL is the distance between the image side surface of the sixth lens element and the imaging surface on the optical axis, TL is the distance between the object side surface of the first lens element and the image side surface of the sixth lens element on the optical axis,

t1 is a thickness of the first lens on the optical axis, T2 is a thickness of the second lens on the optical axis, T3 is a thickness of the third lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, T6 is a thickness of the sixth lens on the optical axis,

g12 is an air gap on the optical axis of the first lens to the second lens, G23 is an air gap on the optical axis of the second lens to the third lens, G34 is an air gap on the optical axis of the third lens to the fourth lens, G45 is an air gap on the optical axis of the fourth lens to the fifth lens, and G56 is an air gap on the optical axis of the fifth lens to the sixth lens. V3 is the abbe number of the third lens. V6 is the abbe number of the sixth lens.

Based on the above, the optical imaging lens according to the embodiment of the present invention has the following beneficial effects: by the concave-convex shape design and arrangement of the object side surface or the image side surface of the lens, the optical imaging lens still has the optical performance of effectively overcoming the aberration under the condition of shortening the system length, and provides a large field angle.

Drawings

FIG. 1 is a schematic diagram illustrating a face structure of a lens.

Fig. 2 is a schematic diagram illustrating a surface type concave-convex structure and a light focus of a lens.

Fig. 3 is a schematic diagram illustrating a face structure of a lens according to an example.

Fig. 4 is a schematic diagram illustrating a surface structure of a lens according to a second example.

Fig. 5 is a schematic diagram illustrating a surface structure of a lens according to a third exemplary embodiment.

Fig. 6 is a schematic diagram of an optical imaging lens according to a first embodiment of the invention.

FIG. 7 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the first embodiment.

FIG. 8 is a detailed optical data table diagram of the optical imaging lens according to the first embodiment of the present invention.

FIG. 9 is a table of aspheric parameters of an optical imaging lens according to a first embodiment of the present invention.

Fig. 10 is a schematic view of an optical imaging lens according to a second embodiment of the present invention.

FIG. 11 is a longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the second embodiment.

FIG. 12 is a detailed optical data table diagram of the optical imaging lens according to the second embodiment of the present invention.

FIG. 13 is a table of aspheric parameters of an optical imaging lens according to a second embodiment of the present invention.

Fig. 14 is a schematic view of an optical imaging lens according to a third embodiment of the present invention.

Fig. 15 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the third embodiment.

FIG. 16 is a detailed optical data table diagram of an optical imaging lens according to a third embodiment of the present invention.

FIG. 17 is a table of aspheric parameters of an optical imaging lens according to a third embodiment of the present invention.

Fig. 18 is a schematic view of an optical imaging lens according to a fourth embodiment of the present invention.

Fig. 19 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fourth embodiment.

FIG. 20 is a detailed optical data table diagram of an optical imaging lens according to a fourth embodiment of the present invention.

FIG. 21 is a table of aspheric parameters of an optical imaging lens according to a fourth embodiment of the present invention.

Fig. 22 is a schematic view of an optical imaging lens according to a fifth embodiment of the present invention.

Fig. 23 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fifth embodiment.

Fig. 24 is a detailed optical data table diagram of an optical imaging lens according to a fifth embodiment of the present invention.

Fig. 25 is a table of aspheric parameters of an optical imaging lens according to a fifth embodiment of the present invention.

Fig. 26 is a schematic view of an optical imaging lens according to a sixth embodiment of the present invention.

Fig. 27 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the sixth embodiment.

Fig. 28 is a detailed optical data table diagram of an optical imaging lens according to a sixth embodiment of the present invention.

FIG. 29 is a table of aspheric parameters of an optical imaging lens according to a sixth embodiment of the present invention.

Fig. 30 is a schematic view of an optical imaging lens according to a seventh embodiment of the present invention.

Fig. 31 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the seventh embodiment.

Fig. 32 is a detailed optical data table diagram of the optical imaging lens according to the seventh embodiment of the present invention.

FIG. 33 is a table of aspheric parameters of an optical imaging lens according to a seventh embodiment of the present invention.

Fig. 34 is a schematic view of an optical imaging lens according to an eighth embodiment of the present invention.

Fig. 35 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the eighth embodiment.

Fig. 36 is a detailed optical data table diagram of an optical imaging lens according to an eighth embodiment of the present invention.

Fig. 37 is an aspheric parameter table diagram of an optical imaging lens according to an eighth embodiment of the present invention.

Fig. 38 is a schematic view of an optical imaging lens according to a ninth embodiment of the present invention.

Fig. 39 is a longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the ninth embodiment.

FIG. 40 is a detailed optical data table diagram of an optical imaging lens according to a ninth embodiment of the present invention.

FIG. 41 is a table of aspheric parameters of an optical imaging lens according to a ninth embodiment of the present invention.

Fig. 42 to 45 are numerical table diagrams of important parameters and their relational expressions of the optical imaging lenses according to the first to ninth embodiments of the present invention.

Detailed Description

Before beginning the detailed description of the invention, reference will first be made explicitly to the accompanying drawings in which:

0: an aperture; 1: a first lens; 2: a second lens; 3: a third lens; 4: a fourth lens; 5: a fifth lens; 6: a sixth lens; 9: an optical filter; 10: an optical imaging lens; 15. 25, 35, 45, 55, 65, 95, 110, 410, 510: an object side surface; 16. 26, 36, 46, 56, 66, 96, 120, 320: an image side; 99: an imaging plane; 100. 200, 300, 400, 500: a lens; 130: an assembling part; 151. 152, 162, 251, 261, 352, 361, 451, 462, 552, 561, 651, 662, Z1: an optical axis region; 153. 164, 253, 263, 353, 354, 363, 454, 463, 464, 553, 554, 563, 564, 654, 663, Z2: a circumferential region; 211. 212, and (3): parallel light rays; a1: an object side; a2: an image side; and (3) CP: a center point; CP 1: a first center point; CP 2: a second center point; EL: an extension line; i: an optical axis; lc: a chief ray; lm: an edge ray; m, R: the intersection of a ray (or ray extension) with the optical axis; OB: an optical boundary; TP 1: a first transition point; TP 2: a second transition point; z3: a relay area.

The optical system of the present specification includes at least one lens that receives imaging light incident on the optical system within a half field of view (HFOV) angle from parallel to the optical axis. The imaging light is imaged on the imaging surface through the optical system. The term "a lens having positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens calculated by the Gaussian optics theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of the imaging light rays passing through the lens surface. The imaging light includes at least two types of light: a chief ray (chief ray) Lc and a marginal ray (margin ray) Lm (see fig. 1). The object-side (or image-side) surface of the lens may be divided into different regions at different positions, including an optical axis region, a circumferential region, or in some embodiments, one or more relay regions, the description of which will be described in detail below.

Fig. 1 is a radial cross-sectional view of a lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a transition point. The center point of the lens surface is an intersection point of the surface and the optical axis I. As illustrated in fig. 1, the first center point CP1 is located on the object side 110 of the lens 100, and the second center point CP2 is located on the image side 120 of the lens 100. The transition point is a point on the lens surface, and a tangent to the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the radially outermost marginal ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, if there are a plurality of transition points on a single lens surface, the transition points are sequentially named from the first transition point in the radially outward direction. For example, a first transition point TP1 (closest to the optical axis I), a second transition point TP2 (shown in fig. 4), and an nth transition point (farthest from the optical axis I).

A range from the center point to the first transition point TP1 is defined as an optical axis region, wherein the optical axis region includes the center point. The area radially outward of the nth switching point farthest from the optical axis I to the optical boundary OB is defined as a circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be further included, and the number of relay areas depends on the number of the transition points.

When a light ray parallel to the optical axis I passes through a region, the region is convex if the light ray is deflected toward the optical axis I and the intersection point with the optical axis I is on the lens image side a 2. When a light ray parallel to the optical axis I passes through a region, the region is concave if the intersection of the extension line of the light ray and the optical axis I is located on the object side a1 of the lens.

In addition, referring to FIG. 1, the lens 100 may further include an assembling portion 130 extending radially outward from the optical boundary OB. The assembling portion 130 is generally used for assembling the lens 100 to a corresponding element (not shown) of an optical system. The imaging light does not reach the assembling portion 130. The structure and shape of the assembly portion 130 are merely examples for illustrating the present invention, and the scope of the present invention is not limited thereby. The lens assembly 130 discussed below may be partially or entirely omitted from the drawings.

Referring to fig. 2, an optical axis region Z1 is defined between the center point CP and the first transition point TP 1. A circumferential zone Z2 is defined between the first transition point TP1 and the optical boundary OB of the lens surface. As shown in fig. 2, the parallel light ray 211 after passing through the optical axis region Z1 intersects the optical axis I at the image side a2 of the lens 200, i.e., the focal point of the parallel light ray 211 passing through the optical axis region Z1 is located at the R point of the image side a2 of the lens 200. Since the light ray intersects the optical axis I at the image side a2 of the lens 200, the optical axis region Z1 is convex. In contrast, the parallel rays 212 diverge after passing through the circumferential zone Z2. As shown in fig. 2, an extension line EL of the parallel light ray 212 passing through the circumferential region Z2 intersects the optical axis I at the object side a1 of the lens 200, i.e., a focal point of the parallel light ray 212 passing through the circumferential region Z2 is located at a point M on the object side a1 of the lens 200. Since the extension line EL of the light ray intersects the optical axis I at the object side a1 of the lens 200, the circumferential region Z2 is concave. In the lens 200 shown in fig. 2, the first transition point TP1 is a boundary between the optical axis region and the circumferential region, i.e., the first transition point TP1 is a boundary point between convex and concave surfaces.

On the other hand, the determination of the surface roughness of the optical axis region can be performed by the judgment method of a person ordinarily skilled in the art, i.e., by determining the surface roughness of the optical axis region of the lens by the sign of the paraxial radius of curvature (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens data sheets) of optical design software. When the R value is positive, the optical axis area of the object side is judged to be a convex surface; and when the R value is negative, judging that the optical axis area of the object side surface is a concave surface. On the contrary, when the R value is positive, the optical axis area of the image side surface is judged to be a concave surface; when the R value is negative, the optical axis area of the image side surface is judged to be convex. The determination result of the method is consistent with the determination result of the intersection point between the ray/ray extension line and the optical axis, i.e. the determination method of the intersection point between the ray/ray extension line and the optical axis is to determine the surface-shaped convexo-concave by locating the focus of the ray parallel to the optical axis at the object side or the image side of the lens. Alternatively, as described herein, "a region is convex (or concave)," "a region is convex (or concave)," or "a region is convex (or concave)" may be used.

Fig. 3 to 5 provide examples of determining the surface shape and the zone boundary of the lens zone in each case, including the optical axis zone, the circumferential zone, and the relay zone described above.

Fig. 3 is a radial cross-sectional view of lens 300. Referring to fig. 3, the image side 320 of the lens 300 presents only one transition point TP1 within the optical boundary OB. Fig. 3 shows an optical axis region Z1 and a circumferential region Z2 of the image side surface 320 of the lens 300. The R value of the image side surface 320 is positive (i.e., R >0), and thus the optical axis region Z1 is concave.

Generally, the shape of each region bounded by the transition point is opposite to the shape of the adjacent region, and thus the transition point can be used to define the transition of the shapes from concave to convex or from convex to concave. In fig. 3, the optical axis region Z1 is concave, and the surface transitions at the transition point TP1, so the circumferential region Z2 is convex.

Fig. 4 is a radial cross-sectional view of lens 400. Referring to fig. 4, the object side 410 of the lens 400 has a first transition point TP1 and a second transition point TP 2. An optical axis region Z1 of the object side surface 410 between the optical axis I and the first transition point TP1 is defined. The object side surface 410 has a positive value of R (i.e., R >0), and thus the optical axis region Z1 is convex.

A circumferential region Z2 is defined between the second transition point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400, the circumferential region Z2 of the object-side surface 410 also being convex. In addition, a relay zone Z3 is defined between the first transition point TP1 and the second transition point TP2, and the relay zone Z3 of the object side 410 is a concave surface. Referring again to fig. 4, the object side surface 410 includes, in order radially outward from the optical axis I, an optical axis region Z1 between the optical axis I and the first transition point TP1, a relay region Z3 between the first transition point TP1 and the second transition point TP2, and a circumferential region Z2 between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400. Since the optical axis region Z1 is convex, the surface shape changes from the first transition point TP1 to concave, the relay region Z3 is concave, and the surface shape changes from the second transition point TP2 to convex, so the circumferential region Z2 is convex.

Fig. 5 is a radial cross-sectional view of lens 500. The object side 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the object side surface 510 of the lens 500, an optical axis area is defined as 0-50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and a circumferential area is defined as 50-100% of the distance from the optical axis I to the optical boundary OB of the lens surface. Referring to the lens 500 shown in fig. 5, 50% of the distance from the optical axis I to the optical boundary OB of the surface of the lens 500 from the optical axis I is defined as an optical axis region Z1 of the object side surface 510. The object side surface 510 has a positive value of R (i.e., R >0), and thus the optical axis region Z1 is convex. Since the object-side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further have an assembling portion (not shown) extending radially outward from the circumferential region Z2.

Fig. 6 is a schematic diagram of an optical imaging lens according to a first embodiment of the invention. Fig. 7A to 7D are longitudinal spherical aberration diagrams and various aberration diagrams of the optical imaging lens according to the first embodiment. Referring to fig. 6, the optical imaging lens 10 includes, in order along an optical axis I from an object side to an image side, a first lens element 1, an aperture stop 0, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6 and a filter 9. When light emitted from an object to be photographed enters the optical imaging lens 10, the light passes through the first lens 1, the aperture 0, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6 and the optical filter 9, and then forms an image on an image plane 99(image plane). The filter 9 is, for example, an infrared cut-off filter (infrared cut-off filter) for preventing a part of infrared rays in the light from being transmitted to the imaging plane 99 to affect the imaging quality. Note that the object side is a side facing the object to be photographed, and the image side is a side facing the imaging plane 99.

The first lens element 1, the second lens element 2, the third lens element 3, the fourth lens element 4, the fifth lens element 5, the sixth lens element 6, and the filter 9 each include an object-

side surface

15, 25, 35, 45, 55, 65, 95 facing the object side and through which the imaging light rays pass, and an image-

side surface

16, 26, 36, 46, 56, 66, 96 facing the image side and through which the imaging light rays pass.

In order to satisfy the requirement of light weight of the product, the first lens 1 to the sixth lens 6 may be made of plastic material, but the material of the first lens 1 to the sixth lens 6 is not limited thereto.

The first lens element 1 has a negative refractive index. The optical axis region 152 of the object-side surface 15 of the first lens element 1 is concave, and the circumferential region 153 of the object-side surface 15 of the first lens element 1 is convex. In addition, the optical axis region 162 and the circumferential region 164 of the image-side surface 16 of the first lens element 1 are both concave.

The second lens element 2 has a positive refractive index. The optical axis region 251 and the circumferential region 253 of the object-side surface 25 of the second lens element 2 are convex. In addition, the optical axis region 261 and the circumferential region 263 of the image-side surface 26 of the second lens element 2 are convex.

The third lens element 3 has a positive refractive index. The optical axis region 352 and the peripheral region 354 of the object-side surface 35 of the third lens element 3 are both concave. In addition, the optical axis region 361 and the circumferential region 363 of the image-side surface 36 of the third lens element 3 are convex.

The fourth lens element 4 has a negative refractive index. An optical axis region 451 of the object-side surface 45 of the fourth lens element 4 is convex, and a circumferential region 454 of the object-side surface 45 of the fourth lens element 4 is concave. An optical axis area 462 of the image-side surface 46 of the fourth lens element 4 is concave, and a circumferential area 463 of the image-side surface 46 of the fourth lens element 4 is convex.

The fifth lens element 5 has a positive refractive index. The optical axis region 552 and the peripheral region 554 of the object-side surface 55 of the fifth lens element 5 are both concave. In addition, the optical axis region 561 and the circumferential region 563 of the image-side surface 56 of the fifth lens element 5 are convex.

The sixth lens element 6 has a negative refractive index. An optical axis region 651 of the object-side surface 65 of the sixth lens element 6 is convex, and a circumferential region 654 of the object-side surface 65 of the sixth lens element 6 is concave. An optical axis region 662 of the image-side surface 66 of the sixth lens 6 is concave, and a circumferential region 663 of the image-side surface 66 of the sixth lens 6 is convex.

In the optical imaging lens 10, only the lenses have refractive indexes, and the optical imaging lens 10 has only the six lenses with refractive indexes.

Other detailed optical data for the first embodiment is shown in fig. 8. The optical imaging lens 10 of the first embodiment has an overall system length (TTL) of 5.411mm, a system focal length (EFL) of 2.115mm, a half field of view (HFOV) of 58.533 °, an image height of 2.880mm, and an aperture value (f-number, Fno) of 2.250. The system length is the distance from the object side surface 15 of the first lens element 1 to the image plane 99 on the optical axis I.

In addition, in this embodiment, the object-side surfaces and the image-side surfaces (twelve surfaces in total) of the six lenses are aspheric surfaces, and the aspheric surfaces are defined by the following formulas:

wherein:

y represents a perpendicular distance between a point on the aspherical curve and the optical axis I;

z represents the depth of the aspheric surface (the perpendicular distance between a point on the aspheric surface that is Y from the optical axis I and a tangent plane tangent to the vertex on the aspheric optical axis I);

r represents the radius of curvature of the lens surface near the optical axis I;

k represents a cone constant (conc constant);

a_2idenotes the 2 i-th order aspheric coefficients.

The aspheric coefficients of object-

side surfaces

15, 25, 35, 45, 55 and 65 and image-

side surfaces

16, 26, 36, 46, 56 and 66 in equation (1) are shown in fig. 9. In fig. 9, the column number 15 indicates the aspheric coefficient of the object-side surface 15 of the first lens element 1, and so on.

In addition, the relationship between the important parameters in the optical imaging lens 10 of the first embodiment is shown in fig. 42 and 43. In the optical imaging lens 10 of the first embodiment,

v1 is the Abbe number (Abbe number) of the first lens 1, which can also be called the Abbe number;

v2 is the abbe number of the second lens 2;

v3 is the abbe number of the third lens 3;

v4 is the abbe number of the fourth lens 4;

v5 is the abbe number of the fifth lens 5;

v6 is the abbe number of the sixth lens 6;

t1 is the thickness of the first lens 1 on the optical axis I;

t2 is the thickness of the second lens 2 on the optical axis I;

t3 is the thickness of the third lens 3 on the optical axis I;

t4 is the thickness of the fourth lens 4 on the optical axis I;

t5 is the thickness of the fifth lens 5 on the optical axis I;

t6 is the thickness of the sixth lens 6 on the optical axis I;

TF is the thickness of the filter 9 on the optical axis I;

g12 is an air gap on the optical axis I between the first lens 1 and the second lens 2;

g23 is an air gap on the optical axis I of the second lens 2 to the third lens 3;

g34 is an air gap on the optical axis I of the third lens 3 to the fourth lens 4;

g45 is an air gap on the optical axis I of the fourth lens 4 to the fifth lens 5;

g56 is an air gap on the optical axis I of the fifth lens 5 to the sixth lens 6;

G6F is an air gap on the optical axis I from the sixth lens 6 to the filter 9;

the GFP is an air gap between the filter 9 and the imaging plane 99 on the optical axis I;

AAG is the sum of five air gaps on the optical axis I of the first lens 1 to the sixth lens 6, i.e., the sum of G12, G23, G34, G45, and G56;

ALT is the sum of the thicknesses of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 on the optical axis I, i.e., the sum of T1, T2, T3, T4, T5, and T6;

EFL is the effective focal length of the optical imaging lens 10;

BFL is the distance from the image-side surface 66 of the sixth lens element 6 to the imaging surface 99 on the optical axis I;

TTL is the distance on the optical axis I from the object-side surface 15 of the first lens element 1 to the image plane 99;

TL is the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 66 of the sixth lens 6; and

the HFOV is a half view angle of the optical imaging lens 10.

Refer again to fig. 7a through 7D. The diagram of a of fig. 7 illustrates longitudinal spherical aberration (longitudinal spherical aberration) of the optical imaging lens 10 of the first embodiment when the pupil radius (pupil) is 0.4701 mm. In a of fig. 7, the curves formed by each wavelength are very close and close to the middle, which shows that the off-axis light beams with different heights of each wavelength are all concentrated near the imaging point, and the deviation of the imaging point of the off-axis light beams with different heights is controlled within the range of-0.04 mm to 0.01mm as can be seen from the deflection amplitude of the curve of each wavelength, so that the optical imaging lens of the first embodiment can obviously improve the spherical aberration with the same wavelength. In addition, the three representative wavelengths are relatively close to each other, and the imaging positions of the light rays representing different wavelengths are relatively concentrated, so that the chromatic aberration is also obviously improved.

The diagrams of B of fig. 7 and C of fig. 7 illustrate field curvature (field curvature) aberration in sagittal direction and field curvature (tangential) aberration in tangential direction on the image plane 99 at wavelengths of 650nm, 555nm, and 470nm, respectively. In the two graphs of field curvature aberration of fig. 7B and fig. 7C, the field curvature aberration of the three representative wavelengths over the entire field of view falls within the range of-0.04 mm to 0.14mm, which illustrates that the optical imaging lens of the first embodiment can effectively eliminate the aberration.

The diagram of D of fig. 7 illustrates distortion aberration (aberration) on the image plane 99 when the wavelengths are 650nm, 555nm, and 470 nm. The distortion aberration diagram of fig. 7D shows that the distortion aberration is maintained within the range of-18% to 3%, which indicates that the distortion aberration of the optical imaging lens of the first embodiment meets the imaging quality requirement of the optical system.

Therefore, the optical imaging lens of the first embodiment can still provide good imaging quality under the condition that the system length is shortened to about 5.411mm compared with the conventional optical lens. In addition, the optical imaging lens of the first embodiment can shorten the system length and enlarge the shooting angle while maintaining good optical performance, so as to realize a product design with a thin profile and an increased field angle.

Fig. 10 is a schematic view of an optical imaging lens according to a second embodiment of the present invention. Fig. 11 a to 11D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the second embodiment. Referring to fig. 10, a second embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. Further, the circumferential region 564 of the image-side surface 56 of the fifth lens 5 is concave. It is to be noted herein that, in order to clearly show the drawings, reference numerals of the same face type as that of the first embodiment are omitted in fig. 10.

Detailed optical data of the optical imaging lens 10 is shown in fig. 12. The optical imaging lens 10 of the second embodiment has a system length (TTL) of 4.865mm, a system focal length (EFL) of 2.497mm, a half field of view (HFOV) of 58.439 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 13 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the second embodiment.

In addition, the relationship between the important parameters in the optical imaging lens 10 of the second embodiment is shown in fig. 42 and 43.

Refer again to fig. 11 a through 11D. In the vertical spherical aberration diagram of a of fig. 11, when the pupil radius is 0.5548mm, the deviation of the imaging point of the off-axis rays of different heights is controlled to be in the range of-0.02 mm to 0.14 mm. In the two field curvature aberration diagrams of B of fig. 11 and C of fig. 11, the three representative wavelengths fall within the range of-0.60 mm to 0.14mm over the entire field of view. In the distortion aberration diagram of D of fig. 11, the distortion aberration is maintained in the range of-25% to 0%. Accordingly, the optical imaging lens 10 of the second embodiment can provide better imaging quality under the condition that the system length is shortened to about 4.865mm compared with the conventional optical lens.

As can be seen from the above description, the advantages of the second embodiment over the first embodiment are: the system length of the second embodiment is less than the system length of the first embodiment. The thickness difference between the optical axis region and the circumferential region of the lens in the second embodiment is smaller than that in the first embodiment, so that the lens in the second embodiment is easier to manufacture and has higher yield.

Fig. 14 is a schematic view of an optical imaging lens according to a third embodiment of the present invention. Fig. 15 a to 15D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the third embodiment. Referring to fig. 14, a third embodiment of the optical imaging lens system 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. Further, the circumferential region 564 of the image-side surface 56 of the fifth lens 5 is concave. It is to be noted herein that, in order to clearly show the drawings, reference numerals of the same face type as that of the first embodiment are omitted in fig. 14.

Detailed optical data of the optical imaging lens 10 is shown in fig. 16. The optical imaging lens 10 of the third embodiment has a system length (TTL) of 5.600mm, a system focal length (EFL) of 2.173mm, a half field of view (HFOV) of 58.459 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 17 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the third embodiment.

In addition, the relationship between the important parameters in the optical imaging lens 10 of the third embodiment is shown in fig. 42 and 43.

Refer again to fig. 15 a through 15D. In the vertical spherical aberration diagram of a of fig. 15, when the pupil radius is 0.4828mm, the deviation of the imaging point of the off-axis rays of different heights is controlled within the range of-0.045 mm to 0.025 mm. In the two field curvature aberration diagrams of B of fig. 15 and C of fig. 15, the field curvature aberrations of the three representative wavelengths over the entire field of view fall within the range of-0.08 mm to 0.06 mm. In the distortion aberration diagram of D of fig. 15, the distortion aberration is maintained in the range of-20% to 4%. Accordingly, the optical imaging lens 10 of the third embodiment can provide good imaging quality even though the system length is shortened to about 5.600mm compared to the conventional optical lens.

As can be seen from the above description, the third embodiment has the following advantages compared to the first embodiment: the field curvature aberration of the third embodiment is smaller than that of the first embodiment. The thickness difference between the optical axis region and the circumferential region of the lens in the third embodiment is smaller than that in the first embodiment, so that the lens in the third embodiment is easier to manufacture and has higher yield.

Fig. 19 a to 19D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens of the fourth embodiment. Referring to fig. 18, a fourth embodiment of the optical imaging lens system 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspheric coefficients and parameters between these lenses are more or less different. In addition, a circumferential region 464 of the image-side surface 46 of the fourth lens element 4 is concave, and a circumferential region 553 of the object-side surface 55 of the fifth lens element 5 is convex. It is to be noted here that, in order to clearly show the drawings, reference numerals of the same face type as that of the first embodiment are omitted in fig. 18.

Detailed optical data of the optical imaging lens 10 is shown in fig. 20. The optical imaging lens 10 of the fourth embodiment has a system length (TTL) of 5.014mm, a system focal length (EFL) of 2.157mm, a half field of view (HFOV) of 58.520 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 21 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the fourth embodiment.

In addition, the relationship between the important parameters in the optical imaging lens 10 of the fourth embodiment is shown in fig. 42 and 43.

Refer again to fig. 19 a through 19D. In the longitudinal spherical aberration diagram of a of fig. 19, when the pupil radius is 0.4793mm, the deviation of the imaging point of the off-axis rays of different heights is controlled to be in the range of-0.035 mm to 0.015 mm. In the two field curvature aberration diagrams of B of fig. 19 and C of fig. 19, the field curvature aberrations of the three representative wavelengths over the entire field of view fall within the range of-0.07 mm to 0.06 mm. In the distortion aberration diagram of D of fig. 19, the distortion aberration is maintained in the range of-20% to 1%. Accordingly, the optical imaging lens 10 of the fourth embodiment can provide better imaging quality under the condition that the system length is shortened to about 5.014mm compared with the conventional optical lens.

As can be seen from the above description, the fourth embodiment has the following advantages compared to the first embodiment: the system length of the fourth embodiment is less than the system length of the first embodiment. The longitudinal spherical aberration, the field curvature aberration, and the distortion aberration of the fourth embodiment are smaller than those of the first embodiment, respectively. The thickness difference between the optical axis region and the circumferential region of the lens in the fourth embodiment is smaller than that in the first embodiment, so that the lens in the fourth embodiment is easier to manufacture and has higher yield.

Fig. 22 is a schematic view of an optical imaging lens according to a fifth embodiment of the present invention. Fig. 23 a to 23D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the fifth embodiment. Referring to fig. 22, a fifth embodiment of the optical imaging lens system 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. In addition, the third lens element 3 has a negative refractive index. The peripheral region 464 of the image-side surface 46 of the fourth lens element 4 is concave. A circumferential region 553 of the object side 55 of the fifth lens element 5 is convex. It is to be noted here that, for the sake of clarity of illustration, reference numerals of the same face type as that of the first embodiment are omitted in fig. 22.

Detailed optical data of the optical imaging lens 10 is shown in fig. 24. The optical imaging lens 10 of the fifth embodiment has a system length (TTL) of 4.790mm, a system focal length (EFL) of 2.117mm, a half field of view (HFOV) of 58.438 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 25 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the fifth embodiment.

Fig. 42 and 43 show the relationship between important parameters in the optical imaging lens 10 according to the fifth embodiment.

Refer again to fig. 23 a through 23D. In the vertical spherical aberration diagram of a of fig. 23, when the pupil radius is 0.4704mm, the deviation of the imaging point of the off-axis rays of different heights is controlled to be in the range of-0.03 mm to 0.015 mm. In the two field curvature aberration diagrams of B of fig. 23 and C of fig. 23, the field curvature aberrations of the three representative wavelengths over the entire field of view fall within the range of-0.12 mm to 0.04 mm. In the distortion aberration diagram of fig. 23D, the distortion aberration is maintained in the range of-18% to 0%. Accordingly, the optical imaging lens 10 of the fifth embodiment can provide better imaging quality under the condition that the system length is shortened to about 4.790mm compared with the conventional optical lens.

As can be seen from the above description, the advantages of the fifth embodiment compared to the first embodiment are: the system length of the fifth embodiment is less than the system length of the first embodiment. The longitudinal spherical aberration, the field curvature aberration, and the distortion aberration of the fifth embodiment are smaller than those of the first embodiment, respectively. The thickness difference between the optical axis region and the circumferential region of the lens in the fifth embodiment is smaller than that in the first embodiment, so that the lens in the fifth embodiment is easier to manufacture and has higher yield.

Fig. 26 is a schematic view of an optical imaging lens according to a sixth embodiment of the present invention. Fig. 27 a to 27D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the sixth embodiment. Referring to fig. 26, a sixth embodiment of the optical imaging lens assembly 10 of the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. Note here that, in fig. 26, the same plane-type reference numerals as those of the first embodiment are omitted for clarity of illustration.

Detailed optical data of the optical imaging lens 10 is shown in fig. 28. The optical imaging lens 10 of the sixth embodiment has a system length (TTL) of 5.035mm, a system focal length (EFL) of 2.086mm, a half field of view (HFOV) of 58.519 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 29 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the sixth embodiment.

Fig. 44 and 45 show the relationship between important parameters in the optical imaging lens 10 according to the sixth embodiment.

Refer again to fig. 27 a through 27D. In the longitudinal spherical aberration diagram of a of fig. 27, when the pupil radius is 0.4634mm, the deviation of the imaging point of the off-axis rays of different heights is controlled in the range of-0.07 mm to 0.02 mm. In the two graphs of field curvature aberration of fig. 27B and 27C, the field curvature aberration of the three representative wavelengths over the entire field of view falls within the range of-0.13 mm to 0.05 mm. In the distortion aberration diagram of D of fig. 27, the distortion aberration is maintained in the range of-18% to 2%. Accordingly, the optical imaging lens 10 of the sixth embodiment can provide better imaging quality under the condition that the system length is shortened to about 5.035mm compared with the conventional optical lens.

As can be seen from the above description, the sixth embodiment has the following advantages compared to the first embodiment: the system length of the sixth embodiment is less than the system length of the first embodiment. The field curvature aberration and distortion aberration of the sixth embodiment are smaller than those of the first embodiment, respectively. The thickness difference between the optical axis region and the circumferential region of the lens in the sixth embodiment is smaller than that in the first embodiment, so that the lens in the sixth embodiment is easier to manufacture and has higher yield.

Fig. 30 is a schematic view of an optical imaging lens according to a seventh embodiment of the present invention. Fig. 31 a to 31D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the seventh embodiment. Referring to fig. 30, a seventh embodiment of an optical imaging lens system 10 according to the present invention is substantially similar to the first embodiment, and the difference between the two embodiments is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. In addition, the optical axis region 151 of the object-side surface 15 of the first lens 1 is convex. A circumferential region 353 of the object side 35 of the third lens element 3 is convex. The peripheral region 464 of the image-side surface 46 of the fourth lens element 4 is concave. It should be noted here that, in order to clearly show the drawings, reference numerals of the same face type as that of the first embodiment are omitted in fig. 30.

Detailed optical data of the optical imaging lens 10 is shown in fig. 32. The optical imaging lens 10 of the seventh embodiment has a system length (TTL) of 4.673mm, a system focal length (EFL) of 2.285mm, a half field of view (HFOV) of 58.520 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 33 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the seventh embodiment.

Fig. 44 and 45 show the relationship between important parameters in the optical imaging lens 10 according to the seventh embodiment.

Refer again to fig. 31 a through fig. 31D. In the longitudinal spherical aberration diagram of a of fig. 31, when the pupil radius is 0.5078mm, the deviation of the imaging point of the off-axis rays of different heights is controlled in the range of-0.02 mm to 0.012 mm. In the two field curvature aberration diagrams of B of fig. 31 and C of fig. 31, the field curvature aberrations of the three representative wavelengths over the entire field of view fall within the range of-0.30 mm to 0.10 mm. In the distortion aberration diagram of D of fig. 31, the distortion aberration is maintained in the range of-25% to 0%. Accordingly, the optical imaging lens 10 of the seventh embodiment can provide better imaging quality under the condition that the system length is shortened to about 4.673mm compared with the conventional optical lens.

As can be seen from the above description, the seventh embodiment has the following advantages compared to the first embodiment: the system length of the seventh embodiment is less than that of the first embodiment. The longitudinal spherical aberration of the seventh embodiment is smaller than that of the first embodiment. The thickness difference between the optical axis region and the circumferential region of the lens in the seventh embodiment is smaller than that in the first embodiment, so that the lens in the seventh embodiment is easier to manufacture and has higher yield.

Fig. 34 is a schematic view of an optical imaging lens according to an eighth embodiment of the present invention. Fig. 35 a to 35D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the eighth embodiment. Referring to fig. 34, an eighth embodiment of the optical imaging lens system 10 of the present invention is substantially similar to the first embodiment, and the difference therebetween is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. In addition, the circumferential region 464 of the image-side surface 46 of the fourth lens element 4 is concave, and the circumferential region 553 of the object-side surface 55 of the fifth lens element 5 is convex. Note here that, in fig. 34, the same face type reference numerals as those of the first embodiment are omitted for clarity of illustration.

Detailed optical data of the optical imaging lens 10 is shown in fig. 36. The optical imaging lens 10 of the eighth embodiment has a system length (TTL) of 5.052mm, a system focal length (EFL) of 2.202mm, a half field of view (HFOV) of 58.521 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 37 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the eighth embodiment.

Fig. 44 and 45 show the relationship between important parameters in the optical imaging lens 10 according to the eighth embodiment.

Refer again to fig. 35 a through 35D. In the vertical spherical aberration diagram of a of fig. 35, when the pupil radius is 0.4892mm, the deviation of the imaging point of the off-axis rays of different heights is controlled to be in the range of-0.025 mm to 0.015 mm. In the two field curvature aberration diagrams of B of fig. 35 and C of fig. 35, the field curvature aberrations of the three representative wavelengths over the entire field of view fall within the range of-0.08 mm to 0.10 mm. In the distortion aberration diagram of D of fig. 35, the distortion aberration is maintained in the range of-21% to 0%. Accordingly, the optical imaging lens 10 of the eighth embodiment can provide better imaging quality under the condition that the system length is shortened to about 5.052mm compared with the conventional optical lens.

As can be seen from the above description, the eighth embodiment has the following advantages compared to the first embodiment: the system length of the eighth embodiment is less than the system length of the first embodiment. The difference between the thickness of the optical axis region and the thickness of the circumferential region of the lens in the eighth embodiment is smaller than that in the first embodiment, so that the lens in the eighth embodiment is easier to manufacture and has higher yield.

Fig. 38 is a schematic view of an optical imaging lens according to a ninth embodiment of the present invention. Fig. 39 a to 39D are longitudinal spherical aberration and aberration diagrams of the optical imaging lens according to the ninth embodiment. Referring to fig. 38, a ninth embodiment of the optical imaging lens assembly 10 of the present invention is substantially similar to the first embodiment, and the difference between the first embodiment and the second embodiment is as follows: the optical data, aspherical coefficients and parameters between these lenses are more or less different. In addition, the circumferential region 464 of the image-side surface 46 of the fourth lens element 4 is concave, and the circumferential region 553 of the object-side surface 55 of the fifth lens element 5 is convex. Note here that, in fig. 38, the same face type reference numerals as those of the first embodiment are omitted for clarity of illustration.

Detailed optical data of the optical imaging lens 10 is shown in fig. 40. The optical imaging lens 10 of the ninth embodiment has a system length (TTL) of 4.913mm, a system focal length (EFL) of 2.247mm, a half field of view (HFOV) of 58.522 °, an image height of 2.880mm, and an aperture value (Fno) of 2.250.

Fig. 41 shows the aspheric coefficients of the object side and the image side of the six lenses in equation (1) in the ninth embodiment.

Fig. 44 and 45 show the relationship between important parameters in the optical imaging lens 10 according to the ninth embodiment.

Refer again to fig. 39 a through 39D. In the longitudinal spherical aberration diagram of a of fig. 39, when the pupil radius is 0.4993mm, the deviation of the imaging point of the off-axis rays of different heights is controlled in the range of-0.05 mm to 0.02 mm. In the two field curvature aberration diagrams of B of fig. 39 and C of fig. 39, the field curvature aberrations of the three representative wavelengths over the entire field of view fall within the range of-0.06 mm to 0.08 mm. In the distortion aberration diagram of fig. 39D, the distortion aberration is maintained in the range of-25% to 0%. Accordingly, the optical imaging lens 10 of the ninth embodiment can provide better imaging quality under the condition that the system length is shortened to about 4.913mm compared with the conventional optical lens.

As can be seen from the above description, the ninth embodiment has the following advantages compared to the first embodiment: the system length of the ninth embodiment is less than the system length of the first embodiment. The field curvature aberration of the ninth embodiment is smaller than that of the first embodiment. The thickness difference between the optical axis region and the circumferential region of the lens in the ninth embodiment is smaller than that in the first embodiment, so that the lens in the ninth embodiment is easier to manufacture and has higher yield.

In each embodiment of the invention, the optical axis region of the image side surface of the second lens element is convex, and the optical axis region of the object side surface of the third lens element is concave, so that light can be effectively condensed. The optical axis area of the object-side surface of the fifth lens element is a concave surface, the fifth lens element has a positive refractive index, and the optical axis area of the object-side surface of the fourth lens element is a convex surface, or the ratio of AAG/T4 is less than or equal to 5.0, or the ratio of AAG/T5 is less than or equal to 1.8, which is advantageous for correcting aberration under the premise of providing a large field angle, wherein the preferred range of AAG/T4 is 3.000 to 5.000, and the preferred range of AAG/T5 is 0.900 to 1.800. When the method meets the requirements of V3-V6 ≧ 20.000, the effects of shortening the system length and ensuring the imaging quality can be achieved, wherein V3-V6 is preferably in the range of 20.000-40.000.

In order to achieve shortening of the system length and ensuring of the imaging quality, it is also one of the means of the present invention to reduce the air gap between the lenses or to appropriately reduce the thickness of the lenses, but at the same time, considering the difficulty of manufacturing, if at least one of the following conditional expressions is satisfied, a better configuration can be provided.

3.600 ≦ (T1+ G12)/(G23+ G34+ G56), preferably 3.600 ≦ (T1+ G12)/(G23+ G34+ G56) ≦ 5.700;

4.600 ≦ EFL/(T3+ G56), preferably 4.600 ≦ EFL/(T3+ G56) ≦ 6.800;

AAG/T2 ≦ 4.000, preferably 1.600 ≦ AAG/T2 ≦ 4.000;

3.700 ALT/(T4+ G56), preferably 3.700 ALT/(T4+ G56) ≦ 10.000;

10.200 ALT/(G23+ G34+ G56), preferably 10.200 ALT/(G23+ G34+ G56) ≦ 18.200;

AAG/G45 ≦ 6.000, preferably 2.900 ≦ AAG/G45 ≦ 6.000;

EFL/T5 ≦ 4.200, preferably 2.200 ≦ EFL/T5 ≦ 4.200;

3.100 ≦ BFL/T3, preferably 3.100 ≦ BFL/T3 ≦ 6.000;

4.500 ≦ (G12+ T5)/(G23+ G34+ G56), preferably 4.500 ≦ (G12+ T5)/(G23+ G34+ G56) ≦ 9.000; and

6.200 ALT/(T3+ G56), preferably 6.200 ALT/(T3+ G56) 9.300.

If at least one of the following conditions is satisfied, the ratio of the optical element parameter to the system length can be maintained at an appropriate value, so as to avoid that the parameter is too small to facilitate the production or that the parameter is too large to make the system length too long.

TTL/(T1+ T5) ≦ 4.800, preferably 3.900 ≦ TTL/(T1+ T5) ≦ 4.800;

TTL/T5 ≦ 7.800, preferably 5.300 ≦ TTL/T5 ≦ 7.800;

TTL/(T5+ T6) is less than or equal to 6.000, preferably 3.200 TTL/(T5+ T6) is less than or equal to 6.000;

13.800 ≦ TTL/(T4+ G56), preferably 13.800 ≦ TTL/(T4+ G56) ≦ 17.000;

TL/(T1+ T5) is less than or equal to 4.100, preferably 2.900 TL/(T1+ T5) is less than or equal to 4.100;

TTL/(T2+ T6) ≦ 5.100, preferably 4.400 ≦ TTL/(T2+ T6) ≦ 5.100; and

TL/(T3+ T5) is less than or equal to 4.000, preferably 3.000 TL/(T3+ T5) is less than or equal to 4.000.

In addition, any combination relationship of the parameters of the embodiment can be selected to increase the lens limitation, so as to facilitate the lens design with the same structure. In view of the unpredictability of the optical system design, the above-mentioned conditions are preferably satisfied under the framework of the present invention, so that the system length of the present invention is shortened, the available aperture is increased, the imaging quality is improved, or the assembly yield is improved, thereby improving the disadvantages of the prior art.

The foregoing list of exemplary defining relationships may optionally be combined in unequal numbers for implementation aspects of the invention, but is not limited thereto. In addition to the above relations, the present invention can also be implemented to design additional features such as concave-convex curved surface arrangement of other more lenses for a single lens or a plurality of lenses to enhance the control of system performance and/or resolution. It should be noted that these details need not be selectively incorporated into other embodiments of the present invention without conflict.

In summary, the optical imaging lens according to the embodiments of the invention can achieve the following effects and advantages:

first, the longitudinal spherical aberration, the field curvature and the distortion of each embodiment of the invention all meet the use specification. In addition, the 650nm, 555nm and 470nm represent off-axis lights with different wavelengths at different heights, which are all concentrated near the imaging point, and the deviation of the off-axis lights at different heights can be seen from the deviation amplitude of each curve, so that the deviation of the imaging point of the off-axis lights at different heights can be controlled, and the spherical aberration, the aberration and the distortion inhibiting capability are good. Further referring to the imaging quality data, the distances between the three representative wavelengths 650nm, 555nm and 470nm are also very close, which shows that the embodiments of the present invention have good concentration to different wavelengths of light and excellent dispersion suppression capability in various states, and thus it can be seen that the embodiments of the present invention have good optical performance.

The above-listed exemplary limiting relationships may optionally be combined in unequal amounts in the embodiments of the present invention, and are not limited thereto.

Third, the range of values within the maximum and minimum values obtained from the combination of the optical parameters disclosed in the embodiments of the present invention can be implemented.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, wherein the first lens to the sixth lens respectively comprise an object side surface facing to the object side and allowing imaging light rays to pass and an image side surface facing to the image side and allowing the imaging light rays to pass, and only the six lenses with refractive indexes are arranged in the optical imaging lens, wherein

An optical axis region of the image side surface of the second lens is a convex surface;

an optical axis region of the object side surface of the third lens is a concave surface;

an optical axis region of the object side surface of the fourth lens is a convex surface;

the fifth lens element has positive refractive index, and an optical axis region of the object-side surface of the fifth lens element is concave; and is

The optical imaging lens conforms to the following conditions: V3-V6 ≧ 20.000, where V3 is the Abbe number of the third lens and V6 is the Abbe number of the sixth lens.

2. An optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, wherein the first lens to the sixth lens respectively comprise an object side surface facing to the object side and allowing imaging light rays to pass and an image side surface facing to the image side and allowing the imaging light rays to pass, and only the six lenses with refractive indexes are arranged in the optical imaging lens, wherein

The optical imaging lens conforms to the following conditions: V3-V6 ≧ 20.000 and AAG/T4 ≦ 5.000, where V3 is an abbe number of the third lens, V6 is an abbe number of the sixth lens, AAG is a sum of five air gaps of the first lens to the sixth lens on the optical axis, and T4 is a thickness of the fourth lens on the optical axis.

3. An optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, wherein the first lens to the sixth lens respectively comprise an object side surface facing to the object side and allowing imaging light rays to pass and an image side surface facing to the image side and allowing the imaging light rays to pass, and only the six lenses with refractive indexes are arranged in the optical imaging lens, wherein

an optical axis region of the object side surface of the fifth lens is a concave surface; and is

The optical imaging lens conforms to the following conditions: V3-V6 ≧ 20.000 and AAG/T5 ≦ 1.800, where V3 is an abbe number of the third lens, V6 is an abbe number of the sixth lens, AAG is a sum of five air gaps of the first lens to the sixth lens on the optical axis, and T5 is a thickness of the fifth lens on the optical axis.

4. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: (T1+ G12)/(G23+ G34+ G56) ≧ 3.600, where T1 is a thickness of the first lens on the optical axis, G12 is an air gap on the optical axis from the first lens to the second lens, G23 is an air gap on the optical axis from the second lens to the third lens, G34 is an air gap on the optical axis from the third lens to the fourth lens, and G56 is an air gap on the optical axis from the fifth lens to the sixth lens.

5. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TTL/(T1+ T5) ≦ 4.800, where TTL is a distance on the optical axis from the object-side surface of the first lens to an imaging surface, T1 is a thickness of the first lens on the optical axis, and T5 is a thickness of the fifth lens on the optical axis.

6. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: EFL/(T3+ G56) ≧ 4.600, where EFL is a system focal length of the optical imaging lens, T3 is a thickness of the third lens on the optical axis, and G56 is an air gap on the optical axis between the fifth lens and the sixth lens.

7. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: AAG/T2 ≦ 4.000, where AAG is a sum of five air gaps of the first lens to the sixth lens on the optical axis, and T2 is a thickness of the second lens on the optical axis.

8. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TTL/T5 ≦ 7.800, where TTL is a distance on the optical axis from the object side surface of the first lens to an imaging surface, and T5 is a thickness of the fifth lens on the optical axis.

9. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: ALT/(T4+ G56) ≧ 3.700, where ALT is a sum of thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, and G56 is an air gap between the fifth lens and the sixth lens on the optical axis.

10. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: ALT/(G23+ G34+ G56) ≧ 10.200, where ALT is a sum of thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens on the optical axis, G23 is an air gap on the optical axis from the second lens to the third lens, G34 is an air gap on the optical axis from the third lens to the fourth lens, and G56 is an air gap on the optical axis from the fifth lens to the sixth lens.

11. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TTL/(T5+ T6) ≦ 6.000, where TTL is a distance on the optical axis from the object-side surface of the first lens to an imaging surface, T5 is a thickness of the fifth lens on the optical axis, and T6 is a thickness of the sixth lens on the optical axis.

12. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TTL/(T4+ G56) ≧ 13.800, where TTL is a distance on the optical axis from the object-side surface of the first lens to an imaging surface, T4 is a thickness on the optical axis of the fourth lens, and G56 is an air gap on the optical axis from the fifth lens to the sixth lens.

13. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: AAG/G45 ≦ 6.000, where AAG is a sum of five air gaps on the optical axis of the first lens to the sixth lens, and G45 is an air gap on the optical axis of the fourth lens to the fifth lens.

14. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: EFL/T5 ≦ 4.200, where EFL is a system focal length of the optical imaging lens and T5 is a thickness of the fifth lens on the optical axis.

15. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: BFL/T3 ≧ 3.100, where BFL is a distance on the optical axis from the image-side surface of the sixth lens element to an imaging surface, and T3 is a thickness of the third lens element on the optical axis.

16. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: (G12+ T5)/(G23+ G34+ G56) ≧ 4.500, where G12 is an air gap on the optical axis from the first lens to the second lens, T5 is a thickness of the fifth lens on the optical axis, G23 is an air gap on the optical axis from the second lens to the third lens, G34 is an air gap on the optical axis from the third lens to the fourth lens, and G56 is an air gap on the optical axis from the fifth lens to the sixth lens.

17. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TL/(T1+ T5) ≦ 4.100, where TL is a distance on the optical axis from the object-side surface of the first lens element to the image-side surface of the sixth lens element, T1 is a thickness of the first lens element on the optical axis, and T5 is a thickness of the fifth lens element on the optical axis.

18. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: ALT/(T3+ G56) ≧ 6.200, where ALT is a sum of thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens on the optical axis, T3 is a thickness of the third lens on the optical axis, and G56 is an air gap between the fifth lens and the sixth lens on the optical axis.

19. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TTL/(T2+ T6) ≦ 5.100, where TTL is a distance on the optical axis from the object-side surface of the first lens to an imaging surface, T2 is a thickness of the second lens on the optical axis, and T6 is a thickness of the sixth lens on the optical axis.

20. The optical imaging lens of any one of claims 1-3, wherein the optical imaging lens conforms to: TL/(T3+ T5) ≦ 4.000, where TL is a distance on the optical axis from the object-side surface of the first lens element to the image-side surface of the sixth lens element, T3 is a thickness of the third lens element on the optical axis, and T5 is a thickness of the fifth lens element on the optical axis.